3 years ago

I really need help on these

Mathematics

2 answers:

Leya [2.2K]3 years ago

6 0

Question 3 the volume is 270 (5x6x9=270)

Snezhnost [94]3 years ago

3 0

It’s 270 I think ahaha

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X³+y³+z³=<br><br> A. 42?<br> B. 45?

kramer

Answer:

Step-by-step explanation:

5 0

3 years ago

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Find the solution of the differential equation dy/dt = ky, k a constant, that satisfies the given conditions. y(0) = 50, y(5) =

irga5000 [103]

Answer: The required solution is $y=50e^{0.1386t}.$

Step-by-step explanation:

We are given to solve the following differential equation :

$\dfrac{dy}{dt}=ky~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)$

where k is a constant and the equation satisfies the conditions y(0) = 50, y(5) = 100.

From equation (i), we have

$\dfrac{dy}{y}=kdt.$

Integrating both sides, we get

$\int\dfrac{dy}{y}=\int kdt\\\\\Rightarrow \log y=kt+c~~~~~~[\textup{c is a constant of integration}]\\\\\Rightarrow y=e^{kt+c}\\\\\Rightarrow y=ae^{kt}~~~~[\textup{where }a=e^c\textup{ is another constant}]$

Also, the conditions are

$y(0)=50\\\\\Rightarrow ae^0=50\\\\\Rightarrow a=50$

and

$y(5)=100\\\\\Rightarrow 50e^{5k}=100\\\\\Rightarrow e^{5k}=2\\\\\Rightarrow 5k=\log_e2\\\\\Rightarrow 5k=0.6931\\\\\Rightarrow k=0.1386.$

Thus, the required solution is $y=50e^{0.1386t}.$

8 0

3 years ago

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0.6×8 and tell me how you got the answer pls<br><img src="https://tex.z-dn.net/?f=0.6%20%5Ctimes%208" id="TexFormula1" title="0.

Tresset [83]

Answer:

4.8 is the answer!

Step-by-step explanation:

0.6 x 8 = 4.8

6 x 8 = 48

multiply 6 by 8, and move the decimal to the left one time, and get 4.8

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3 years ago

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Which of the following expressions results in 0 when evaluated at x = 4?

Naily [24]

A).(x - 10) X (x - 4)
(4 - 10) X (4 - 4)
6 X 0 = 0

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4 years ago

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Ali swims 4m for every 1m Anton swims. By how far in meters will Ali beat Anton if the race is 50m?

Harrizon [31]

I believe the answer is 200m

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3 years ago